drm/radeon/kms: HDMI support for R600 KMS

Adding basic HDMI support for R600 KMS, ported from radeonhd ddx.

[airlied:- checkpatch cleanups]
Signed-off-by: Christian Koenig <deathsimple@vodafone.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>

9 files changed, 895 insertions, 6 deletions

diff --git a/drivers/gpu/drm/radeon/Makefile b/drivers/gpu/drm/radeon/Makefile
index feb52eee431..b5f5fe75e6a 100644
--- a/drivers/gpu/drm/radeon/Makefile
+++ b/drivers/gpu/drm/radeon/Makefile
@@ -49,7 +49,7 @@ radeon-y += radeon_device.o radeon_kms.o \
 	radeon_cs.o radeon_bios.o radeon_benchmark.o r100.o r300.o r420.o \
 	rs400.o rs600.o rs690.o rv515.o r520.o r600.o rv770.o radeon_test.o \
 	r200.o radeon_legacy_tv.o r600_cs.o r600_blit.o r600_blit_shaders.o \
-	r600_blit_kms.o radeon_pm.o atombios_dp.o
+	r600_blit_kms.o radeon_pm.o atombios_dp.o r600_audio.o r600_hdmi.o
 
 radeon-$(CONFIG_COMPAT) += radeon_ioc32.o
 
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index e145faac990..5c6058c6ddd 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2067,6 +2067,10 @@ int r600_init(struct radeon_device *rdev)
 			rdev->accel_working = false;
 		}
 	}
+
+	r = r600_audio_init(rdev);
+	if (r)
+		return r; /* TODO error handling */
 	return 0;
 }
 
@@ -2075,6 +2079,7 @@ void r600_fini(struct radeon_device *rdev)
 	/* Suspend operations */
 	r600_suspend(rdev);
 
+	r600_audio_fini(rdev);
 	r600_blit_fini(rdev);
 	r600_irq_fini(rdev);
 	radeon_irq_kms_fini(rdev);
diff --git a/drivers/gpu/drm/radeon/r600_audio.c b/drivers/gpu/drm/radeon/r600_audio.c
new file mode 100644
index 00000000000..99e2c3891a7
--- /dev/null
+++ b/drivers/gpu/drm/radeon/r600_audio.c
@@ -0,0 +1,267 @@
+/*
+ * Copyright 2008 Advanced Micro Devices, Inc.
+ * Copyright 2008 Red Hat Inc.
+ * Copyright 2009 Christian König.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Christian König
+ */
+#include "drmP.h"
+#include "radeon.h"
+#include "radeon_reg.h"
+#include "atom.h"
+
+#define AUDIO_TIMER_INTERVALL 100 /* 1/10 sekund should be enough */
+
+/*
+ * check if the chipset is supported
+ */
+static int r600_audio_chipset_supported(struct radeon_device *rdev)
+{
+	return rdev->family >= CHIP_R600
+		|| rdev->family == CHIP_RS600
+		|| rdev->family == CHIP_RS690
+		|| rdev->family == CHIP_RS740;
+}
+
+/*
+ * current number of channels
+ */
+static int r600_audio_channels(struct radeon_device *rdev)
+{
+	return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
+}
+
+/*
+ * current bits per sample
+ */
+static int r600_audio_bits_per_sample(struct radeon_device *rdev)
+{
+	uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
+	switch (value) {
+	case 0x0: return  8;
+	case 0x1: return 16;
+	case 0x2: return 20;
+	case 0x3: return 24;
+	case 0x4: return 32;
+	}
+
+	DRM_ERROR("Unknown bits per sample 0x%x using 16 instead.\n", (int)value);
+
+	return 16;
+}
+
+/*
+ * current sampling rate in HZ
+ */
+static int r600_audio_rate(struct radeon_device *rdev)
+{
+	uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
+	uint32_t result;
+
+	if (value & 0x4000)
+		result = 44100;
+	else
+		result = 48000;
+
+	result *= ((value >> 11) & 0x7) + 1;
+	result /= ((value >> 8) & 0x7) + 1;
+
+	return result;
+}
+
+/*
+ * iec 60958 status bits
+ */
+static uint8_t r600_audio_status_bits(struct radeon_device *rdev)
+{
+	return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
+}
+
+/*
+ * iec 60958 category code
+ */
+static uint8_t r600_audio_category_code(struct radeon_device *rdev)
+{
+	return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
+}
+
+/*
+ * update all hdmi interfaces with current audio parameters
+ */
+static void r600_audio_update_hdmi(unsigned long param)
+{
+	struct radeon_device *rdev = (struct radeon_device *)param;
+	struct drm_device *dev = rdev->ddev;
+
+	int channels = r600_audio_channels(rdev);
+	int rate = r600_audio_rate(rdev);
+	int bps = r600_audio_bits_per_sample(rdev);
+	uint8_t status_bits = r600_audio_status_bits(rdev);
+	uint8_t category_code = r600_audio_category_code(rdev);
+
+	struct drm_encoder *encoder;
+	int changes = 0;
+
+	changes |= channels != rdev->audio_channels;
+	changes |= rate != rdev->audio_rate;
+	changes |= bps != rdev->audio_bits_per_sample;
+	changes |= status_bits != rdev->audio_status_bits;
+	changes |= category_code != rdev->audio_category_code;
+
+	if (changes) {
+		rdev->audio_channels = channels;
+		rdev->audio_rate = rate;
+		rdev->audio_bits_per_sample = bps;
+		rdev->audio_status_bits = status_bits;
+		rdev->audio_category_code = category_code;
+	}
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		if (changes || r600_hdmi_buffer_status_changed(encoder))
+			r600_hdmi_update_audio_settings(
+				encoder, channels,
+				rate, bps, status_bits,
+				category_code);
+	}
+
+	mod_timer(&rdev->audio_timer,
+		jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
+}
+
+/*
+ * initialize the audio vars and register the update timer
+ */
+int r600_audio_init(struct radeon_device *rdev)
+{
+	if (!r600_audio_chipset_supported(rdev))
+		return 0;
+
+	DRM_INFO("%s audio support", radeon_audio ? "Enabling" : "Disabling");
+	WREG32_P(R600_AUDIO_ENABLE, radeon_audio ? 0x81000000 : 0x0, ~0x81000000);
+
+	rdev->audio_channels = -1;
+	rdev->audio_rate = -1;
+	rdev->audio_bits_per_sample = -1;
+	rdev->audio_status_bits = 0;
+	rdev->audio_category_code = 0;
+
+	setup_timer(
+		&rdev->audio_timer,
+		r600_audio_update_hdmi,
+		(unsigned long)rdev);
+
+	mod_timer(&rdev->audio_timer, jiffies + 1);
+
+	return 0;
+}
+
+/*
+ * determin how the encoders and audio interface is wired together
+ */
+int r600_audio_tmds_index(struct drm_encoder *encoder)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	struct drm_encoder *other;
+
+	switch (radeon_encoder->encoder_id) {
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+		return 0;
+
+	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
+		/* special case check if an TMDS1 is present */
+		list_for_each_entry(other, &dev->mode_config.encoder_list, head) {
+			if (to_radeon_encoder(other)->encoder_id ==
+				ENCODER_OBJECT_ID_INTERNAL_TMDS1)
+				return 1;
+		}
+		return 0;
+
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+		return 1;
+
+	default:
+		DRM_ERROR("Unsupported encoder type 0x%02X\n",
+			  radeon_encoder->encoder_id);
+		return -1;
+	}
+}
+
+/*
+ * atach the audio codec to the clock source of the encoder
+ */
+void r600_audio_set_clock(struct drm_encoder *encoder, int clock)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	int base_rate = 48000;
+
+	switch (radeon_encoder->encoder_id) {
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
+	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
+		WREG32_P(R600_AUDIO_TIMING, 0, ~0x301);
+		break;
+
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+		WREG32_P(R600_AUDIO_TIMING, 0x100, ~0x301);
+		break;
+
+	default:
+		DRM_ERROR("Unsupported encoder type 0x%02X\n",
+			  radeon_encoder->encoder_id);
+		return;
+	}
+
+	switch (r600_audio_tmds_index(encoder)) {
+	case 0:
+		WREG32(R600_AUDIO_PLL1_MUL, base_rate*50);
+		WREG32(R600_AUDIO_PLL1_DIV, clock*100);
+		WREG32(R600_AUDIO_CLK_SRCSEL, 0);
+		break;
+
+	case 1:
+		WREG32(R600_AUDIO_PLL2_MUL, base_rate*50);
+		WREG32(R600_AUDIO_PLL2_DIV, clock*100);
+		WREG32(R600_AUDIO_CLK_SRCSEL, 1);
+		break;
+	}
+}
+
+/*
+ * release the audio timer
+ * TODO: How to do this correctly on SMP systems?
+ */
+void r600_audio_fini(struct radeon_device *rdev)
+{
+	if (!r600_audio_chipset_supported(rdev))
+		return;
+
+	WREG32_P(R600_AUDIO_ENABLE, 0x0, ~0x81000000);
+
+	del_timer(&rdev->audio_timer);
+}
diff --git a/drivers/gpu/drm/radeon/r600_hdmi.c b/drivers/gpu/drm/radeon/r600_hdmi.c
new file mode 100644
index 00000000000..fcc949df0e5
--- /dev/null
+++ b/drivers/gpu/drm/radeon/r600_hdmi.c
@@ -0,0 +1,506 @@
+/*
+ * Copyright 2008 Advanced Micro Devices, Inc.
+ * Copyright 2008 Red Hat Inc.
+ * Copyright 2009 Christian König.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Christian König
+ */
+#include "drmP.h"
+#include "radeon_drm.h"
+#include "radeon.h"
+#include "atom.h"
+
+/*
+ * HDMI color format
+ */
+enum r600_hdmi_color_format {
+	RGB = 0,
+	YCC_422 = 1,
+	YCC_444 = 2
+};
+
+/*
+ * IEC60958 status bits
+ */
+enum r600_hdmi_iec_status_bits {
+	AUDIO_STATUS_DIG_ENABLE   = 0x01,
+	AUDIO_STATUS_V	    = 0x02,
+	AUDIO_STATUS_VCFG	 = 0x04,
+	AUDIO_STATUS_EMPHASIS     = 0x08,
+	AUDIO_STATUS_COPYRIGHT    = 0x10,
+	AUDIO_STATUS_NONAUDIO     = 0x20,
+	AUDIO_STATUS_PROFESSIONAL = 0x40,
+	AUDIO_STATUS_LEVEL	= 0x80
+};
+
+struct {
+	uint32_t Clock;
+
+	int N_32kHz;
+	int CTS_32kHz;
+
+	int N_44_1kHz;
+	int CTS_44_1kHz;
+
+	int N_48kHz;
+	int CTS_48kHz;
+
+} r600_hdmi_ACR[] = {
+    /*	     32kHz	  44.1kHz	48kHz    */
+    /* Clock      N     CTS      N     CTS      N     CTS */
+    {  25174,  4576,  28125,  7007,  31250,  6864,  28125 }, /*  25,20/1.001 MHz */
+    {  25200,  4096,  25200,  6272,  28000,  6144,  25200 }, /*  25.20       MHz */
+    {  27000,  4096,  27000,  6272,  30000,  6144,  27000 }, /*  27.00       MHz */
+    {  27027,  4096,  27027,  6272,  30030,  6144,  27027 }, /*  27.00*1.001 MHz */
+    {  54000,  4096,  54000,  6272,  60000,  6144,  54000 }, /*  54.00       MHz */
+    {  54054,  4096,  54054,  6272,  60060,  6144,  54054 }, /*  54.00*1.001 MHz */
+    {  74175, 11648, 210937, 17836, 234375, 11648, 140625 }, /*  74.25/1.001 MHz */
+    {  74250,  4096,  74250,  6272,  82500,  6144,  74250 }, /*  74.25       MHz */
+    { 148351, 11648, 421875,  8918, 234375,  5824, 140625 }, /* 148.50/1.001 MHz */
+    { 148500,  4096, 148500,  6272, 165000,  6144, 148500 }, /* 148.50       MHz */
+    {      0,  4096,      0,  6272,      0,  6144,      0 }  /* Other */
+};
+
+/*
+ * calculate CTS value if it's not found in the table
+ */
+static void r600_hdmi_calc_CTS(uint32_t clock, int *CTS, int N, int freq)
+{
+	if (*CTS == 0)
+		*CTS = clock*N/(128*freq)*1000;
+	DRM_DEBUG("Using ACR timing N=%d CTS=%d for frequency %d\n",
+		  N, *CTS, freq);
+}
+
+/*
+ * update the N and CTS parameters for a given pixel clock rate
+ */
+static void r600_hdmi_update_ACR(struct drm_encoder *encoder, uint32_t clock)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	uint32_t offset = to_radeon_encoder(encoder)->hdmi_offset;
+	int CTS;
+	int N;
+	int i;
+
+	for (i = 0; r600_hdmi_ACR[i].Clock != clock && r600_hdmi_ACR[i].Clock != 0; i++);
+
+	CTS = r600_hdmi_ACR[i].CTS_32kHz;
+	N = r600_hdmi_ACR[i].N_32kHz;
+	r600_hdmi_calc_CTS(clock, &CTS, N, 32000);
+	WREG32(offset+R600_HDMI_32kHz_CTS, CTS << 12);
+	WREG32(offset+R600_HDMI_32kHz_N, N);
+
+	CTS = r600_hdmi_ACR[i].CTS_44_1kHz;
+	N = r600_hdmi_ACR[i].N_44_1kHz;
+	r600_hdmi_calc_CTS(clock, &CTS, N, 44100);
+	WREG32(offset+R600_HDMI_44_1kHz_CTS, CTS << 12);
+	WREG32(offset+R600_HDMI_44_1kHz_N, N);
+
+	CTS = r600_hdmi_ACR[i].CTS_48kHz;
+	N = r600_hdmi_ACR[i].N_48kHz;
+	r600_hdmi_calc_CTS(clock, &CTS, N, 48000);
+	WREG32(offset+R600_HDMI_48kHz_CTS, CTS << 12);
+	WREG32(offset+R600_HDMI_48kHz_N, N);
+}
+
+/*
+ * calculate the crc for a given info frame
+ */
+static void r600_hdmi_infoframe_checksum(uint8_t packetType,
+					 uint8_t versionNumber,
+					 uint8_t length,
+					 uint8_t *frame)
+{
+    int i;
+    frame[0] = packetType + versionNumber + length;
+    for (i = 1; i <= length; i++)
+	frame[0] += frame[i];
+    frame[0] = 0x100 - frame[0];
+}
+
+/*
+ * build a HDMI Video Info Frame
+ */
+static void r600_hdmi_videoinfoframe(
+	struct drm_encoder *encoder,
+	enum r600_hdmi_color_format color_format,
+	int active_information_present,
+	uint8_t active_format_aspect_ratio,
+	uint8_t scan_information,
+	uint8_t colorimetry,
+	uint8_t ex_colorimetry,
+	uint8_t quantization,
+	int ITC,
+	uint8_t picture_aspect_ratio,
+	uint8_t video_format_identification,
+	uint8_t pixel_repetition,
+	uint8_t non_uniform_picture_scaling,
+	uint8_t bar_info_data_valid,
+	uint16_t top_bar,
+	uint16_t bottom_bar,
+	uint16_t left_bar,
+	uint16_t right_bar
+)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	uint32_t offset = to_radeon_encoder(encoder)->hdmi_offset;
+
+	uint8_t frame[14];
+
+	frame[0x0] = 0;
+	frame[0x1] =
+		(scan_information & 0x3) |
+		((bar_info_data_valid & 0x3) << 2) |
+		((active_information_present & 0x1) << 4) |
+		((color_format & 0x3) << 5);
+	frame[0x2] =
+		(active_format_aspect_ratio & 0xF) |
+		((picture_aspect_ratio & 0x3) << 4) |
+		((colorimetry & 0x3) << 6);
+	frame[0x3] =
+		(non_uniform_picture_scaling & 0x3) |
+		((quantization & 0x3) << 2) |
+		((ex_colorimetry & 0x7) << 4) |
+		((ITC & 0x1) << 7);
+	frame[0x4] = (video_format_identification & 0x7F);
+	frame[0x5] = (pixel_repetition & 0xF);
+	frame[0x6] = (top_bar & 0xFF);
+	frame[0x7] = (top_bar >> 8);
+	frame[0x8] = (bottom_bar & 0xFF);
+	frame[0x9] = (bottom_bar >> 8);
+	frame[0xA] = (left_bar & 0xFF);
+	frame[0xB] = (left_bar >> 8);
+	frame[0xC] = (right_bar & 0xFF);
+	frame[0xD] = (right_bar >> 8);
+
+	r600_hdmi_infoframe_checksum(0x82, 0x02, 0x0D, frame);
+
+	WREG32(offset+R600_HDMI_VIDEOINFOFRAME_0,
+		frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
+	WREG32(offset+R600_HDMI_VIDEOINFOFRAME_1,
+		frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x7] << 24));
+	WREG32(offset+R600_HDMI_VIDEOINFOFRAME_2,
+		frame[0x8] | (frame[0x9] << 8) | (frame[0xA] << 16) | (frame[0xB] << 24));
+	WREG32(offset+R600_HDMI_VIDEOINFOFRAME_3,
+		frame[0xC] | (frame[0xD] << 8));
+}
+
+/*
+ * build a Audio Info Frame
+ */
+static void r600_hdmi_audioinfoframe(
+	struct drm_encoder *encoder,
+	uint8_t channel_count,
+	uint8_t coding_type,
+	uint8_t sample_size,
+	uint8_t sample_frequency,
+	uint8_t format,
+	uint8_t channel_allocation,
+	uint8_t level_shift,
+	int downmix_inhibit
+)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	uint32_t offset = to_radeon_encoder(encoder)->hdmi_offset;
+
+	uint8_t frame[11];
+
+	frame[0x0] = 0;
+	frame[0x1] = (channel_count & 0x7) | ((coding_type & 0xF) << 4);
+	frame[0x2] = (sample_size & 0x3) | ((sample_frequency & 0x7) << 2);
+	frame[0x3] = format;
+	frame[0x4] = channel_allocation;
+	frame[0x5] = ((level_shift & 0xF) << 3) | ((downmix_inhibit & 0x1) << 7);
+	frame[0x6] = 0;
+	frame[0x7] = 0;
+	frame[0x8] = 0;
+	frame[0x9] = 0;
+	frame[0xA] = 0;
+
+	r600_hdmi_infoframe_checksum(0x84, 0x01, 0x0A, frame);
+
+	WREG32(offset+R600_HDMI_AUDIOINFOFRAME_0,
+		frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
+	WREG32(offset+R600_HDMI_AUDIOINFOFRAME_1,
+		frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x8] << 24));
+}
+
+/*
+ * test if audio buffer is filled enough to start playing
+ */
+static int r600_hdmi_is_audio_buffer_filled(struct drm_encoder *encoder)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	uint32_t offset = to_radeon_encoder(encoder)->hdmi_offset;
+
+	return (RREG32(offset+R600_HDMI_STATUS) & 0x10) != 0;
+}
+
+/*
+ * have buffer status changed since last call?
+ */
+int r600_hdmi_buffer_status_changed(struct drm_encoder *encoder)
+{
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	int status, result;
+
+	if (!radeon_encoder->hdmi_offset)
+		return 0;
+
+	status = r600_hdmi_is_audio_buffer_filled(encoder);
+	result = radeon_encoder->hdmi_buffer_status != status;
+	radeon_encoder->hdmi_buffer_status = status;
+
+	return result;
+}
+
+/*
+ * write the audio workaround status to the hardware
+ */
+void r600_hdmi_audio_workaround(struct drm_encoder *encoder)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	uint32_t offset = radeon_encoder->hdmi_offset;
+
+	if (!offset)
+		return;
+
+	if (r600_hdmi_is_audio_buffer_filled(encoder)) {
+		/* disable audio workaround and start delivering of audio frames */
+		WREG32_P(offset+R600_HDMI_CNTL, 0x00000001, ~0x00001001);
+
+	} else if (radeon_encoder->hdmi_audio_workaround) {
+		/* enable audio workaround and start delivering of audio frames */
+		WREG32_P(offset+R600_HDMI_CNTL, 0x00001001, ~0x00001001);
+
+	} else {
+		/* disable audio workaround and stop delivering of audio frames */
+		WREG32_P(offset+R600_HDMI_CNTL, 0x00000000, ~0x00001001);
+	}
+}
+
+
+/*
+ * update the info frames with the data from the current display mode
+ */
+void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	uint32_t offset = to_radeon_encoder(encoder)->hdmi_offset;
+
+	if (!offset)
+		return;
+
+	r600_audio_set_clock(encoder, mode->clock);
+
+	WREG32(offset+R600_HDMI_UNKNOWN_0, 0x1000);
+	WREG32(offset+R600_HDMI_UNKNOWN_1, 0x0);
+	WREG32(offset+R600_HDMI_UNKNOWN_2, 0x1000);
+
+	r600_hdmi_update_ACR(encoder, mode->clock);
+
+	WREG32(offset+R600_HDMI_VIDEOCNTL, 0x13);
+
+	WREG32(offset+R600_HDMI_VERSION, 0x202);
+
+	r600_hdmi_videoinfoframe(encoder, RGB, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+
+	/* it's unknown what these bits do excatly, but it's indeed quite usefull for debugging */
+	WREG32(offset+R600_HDMI_AUDIO_DEBUG_0, 0x00FFFFFF);
+	WREG32(offset+R600_HDMI_AUDIO_DEBUG_1, 0x007FFFFF);
+	WREG32(offset+R600_HDMI_AUDIO_DEBUG_2, 0x00000001);
+	WREG32(offset+R600_HDMI_AUDIO_DEBUG_3, 0x00000001);
+
+	r600_hdmi_audio_workaround(encoder);
+
+	/* audio packets per line, does anyone know how to calc this ? */
+	WREG32_P(offset+R600_HDMI_CNTL, 0x00040000, ~0x001F0000);
+
+	/* update? reset? don't realy know */
+	WREG32_P(offset+R600_HDMI_CNTL, 0x14000000, ~0x14000000);
+}
+
+/*
+ * update settings with current parameters from audio engine
+ */
+void r600_hdmi_update_audio_settings(struct drm_encoder *encoder,
+				     int channels,
+				     int rate,
+				     int bps,
+				     uint8_t status_bits,
+				     uint8_t category_code)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	uint32_t offset = to_radeon_encoder(encoder)->hdmi_offset;
+
+	uint32_t iec;
+
+	if (!offset)
+		return;
+
+	DRM_DEBUG("%s with %d channels, %d Hz sampling rate, %d bits per sample,\n",
+		 r600_hdmi_is_audio_buffer_filled(encoder) ? "playing" : "stopped",
+		channels, rate, bps);
+	DRM_DEBUG("0x%02X IEC60958 status bits and 0x%02X category code\n",
+		  (int)status_bits, (int)category_code);
+
+	iec = 0;
+	if (status_bits & AUDIO_STATUS_PROFESSIONAL)
+		iec |= 1 << 0;
+	if (status_bits & AUDIO_STATUS_NONAUDIO)
+		iec |= 1 << 1;
+	if (status_bits & AUDIO_STATUS_COPYRIGHT)
+		iec |= 1 << 2;
+	if (status_bits & AUDIO_STATUS_EMPHASIS)
+		iec |= 1 << 3;
+
+	iec |= category_code << 8;
+
+	switch (rate) {
+	case  32000: iec |= 0x3 << 24; break;
+	case  44100: iec |= 0x0 << 24; break;
+	case  88200: iec |= 0x8 << 24; break;
+	case 176400: iec |= 0xc << 24; break;
+	case  48000: iec |= 0x2 << 24; break;
+	case  96000: iec |= 0xa << 24; break;
+	case 192000: iec |= 0xe << 24; break;
+	}
+
+	WREG32(offset+R600_HDMI_IEC60958_1, iec);
+
+	iec = 0;
+	switch (bps) {
+	case 16: iec |= 0x2; break;
+	case 20: iec |= 0x3; break;
+	case 24: iec |= 0xb; break;
+	}
+	if (status_bits & AUDIO_STATUS_V)
+		iec |= 0x5 << 16;
+
+	WREG32_P(offset+R600_HDMI_IEC60958_2, iec, ~0x5000f);
+
+	/* 0x021 or 0x031 sets the audio frame length */
+	WREG32(offset+R600_HDMI_AUDIOCNTL, 0x31);
+	r600_hdmi_audioinfoframe(encoder, channels-1, 0, 0, 0, 0, 0, 0, 0);
+
+	r600_hdmi_audio_workaround(encoder);
+
+	/* update? reset? don't realy know */
+	WREG32_P(offset+R600_HDMI_CNTL, 0x04000000, ~0x04000000);
+}
+
+/*
+ * enable/disable the HDMI engine
+ */
+void r600_hdmi_enable(struct drm_encoder *encoder, int enable)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	uint32_t offset = to_radeon_encoder(encoder)->hdmi_offset;
+
+	if (!offset)
+		return;
+
+	DRM_DEBUG("%s HDMI interface @ 0x%04X\n", enable ? "Enabling" : "Disabling", offset);
+
+	/* some version of atombios ignore the enable HDMI flag
+	 * so enabling/disabling HDMI was moved here for TMDS1+2 */
+	switch (radeon_encoder->encoder_id) {
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
+		WREG32_P(AVIVO_TMDSA_CNTL, enable ? 0x4 : 0x0, ~0x4);
+		WREG32(offset+R600_HDMI_ENABLE, enable ? 0x101 : 0x0);
+		break;
+
+	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
+		WREG32_P(AVIVO_LVTMA_CNTL, enable ? 0x4 : 0x0, ~0x4);
+		WREG32(offset+R600_HDMI_ENABLE, enable ? 0x105 : 0x0);
+		break;
+
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+		/* This part is doubtfull in my opinion */
+		WREG32(offset+R600_HDMI_ENABLE, enable ? 0x110 : 0x0);
+		break;
+
+	default:
+		DRM_ERROR("unknown HDMI output type\n");
+		break;
+	}
+}
+
+/*
+ * determin at which register offset the HDMI encoder is
+ */
+void r600_hdmi_init(struct drm_encoder *encoder)
+{
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+
+	switch (radeon_encoder->encoder_id) {
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+		radeon_encoder->hdmi_offset = R600_HDMI_TMDS1;
+		break;
+
+	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
+		switch (r600_audio_tmds_index(encoder)) {
+		case 0:
+			radeon_encoder->hdmi_offset = R600_HDMI_TMDS1;
+			break;
+		case 1:
+			radeon_encoder->hdmi_offset = R600_HDMI_TMDS2;
+			break;
+		default:
+			radeon_encoder->hdmi_offset = 0;
+			break;
+		}
+	case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+		radeon_encoder->hdmi_offset = R600_HDMI_TMDS2;
+		break;
+
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+		radeon_encoder->hdmi_offset = R600_HDMI_DIG;
+		break;
+
+	default:
+		radeon_encoder->hdmi_offset = 0;
+		break;
+	}
+
+	DRM_DEBUG("using HDMI engine at offset 0x%04X for encoder 0x%x\n",
+		  radeon_encoder->hdmi_offset, radeon_encoder->encoder_id);
+
+	/* TODO: make this configureable */
+	radeon_encoder->hdmi_audio_workaround = 0;
+}
diff --git a/drivers/gpu/drm/radeon/r600_reg.h b/drivers/gpu/drm/radeon/r600_reg.h
index e2d1f5f33f7..d0e28ffdeda 100644
--- a/drivers/gpu/drm/radeon/r600_reg.h
+++ b/drivers/gpu/drm/radeon/r600_reg.h
@@ -110,5 +110,79 @@
 #define R600_BIOS_6_SCRATCH               0x173c
 #define R600_BIOS_7_SCRATCH               0x1740
 
+/* Audio, these regs were reverse enginered,
+ * so the chance is high that the naming is wrong
+ * R6xx+ ??? */
+
+/* Audio clocks */
+#define R600_AUDIO_PLL1_MUL               0x0514
+#define R600_AUDIO_PLL1_DIV               0x0518
+#define R600_AUDIO_PLL2_MUL               0x0524
+#define R600_AUDIO_PLL2_DIV               0x0528
+#define R600_AUDIO_CLK_SRCSEL             0x0534
+
+/* Audio general */
+#define R600_AUDIO_ENABLE                 0x7300
+#define R600_AUDIO_TIMING                 0x7344
+
+/* Audio params */
+#define R600_AUDIO_VENDOR_ID              0x7380
+#define R600_AUDIO_REVISION_ID            0x7384
+#define R600_AUDIO_ROOT_NODE_COUNT        0x7388
+#define R600_AUDIO_NID1_NODE_COUNT        0x738c
+#define R600_AUDIO_NID1_TYPE              0x7390
+#define R600_AUDIO_SUPPORTED_SIZE_RATE    0x7394
+#define R600_AUDIO_SUPPORTED_CODEC        0x7398
+#define R600_AUDIO_SUPPORTED_POWER_STATES 0x739c
+#define R600_AUDIO_NID2_CAPS              0x73a0
+#define R600_AUDIO_NID3_CAPS              0x73a4
+#define R600_AUDIO_NID3_PIN_CAPS          0x73a8
+
+/* Audio conn list */
+#define R600_AUDIO_CONN_LIST_LEN          0x73ac
+#define R600_AUDIO_CONN_LIST              0x73b0
+
+/* Audio verbs */
+#define R600_AUDIO_RATE_BPS_CHANNEL       0x73c0
+#define R600_AUDIO_PLAYING                0x73c4
+#define R600_AUDIO_IMPLEMENTATION_ID      0x73c8
+#define R600_AUDIO_CONFIG_DEFAULT         0x73cc
+#define R600_AUDIO_PIN_SENSE              0x73d0
+#define R600_AUDIO_PIN_WIDGET_CNTL        0x73d4
+#define R600_AUDIO_STATUS_BITS            0x73d8
+
+/* HDMI base register addresses */
+#define R600_HDMI_TMDS1                   0x7400
+#define R600_HDMI_TMDS2                   0x7700
+#define R600_HDMI_DIG                     0x7800
+
+/* HDMI registers */
+#define R600_HDMI_ENABLE           0x00
+#define R600_HDMI_STATUS           0x04
+#define R600_HDMI_CNTL             0x08
+#define R600_HDMI_UNKNOWN_0        0x0C
+#define R600_HDMI_AUDIOCNTL        0x10
+#define R600_HDMI_VIDEOCNTL        0x14
+#define R600_HDMI_VERSION          0x18
+#define R600_HDMI_UNKNOWN_1        0x28
+#define R600_HDMI_VIDEOINFOFRAME_0 0x54
+#define R600_HDMI_VIDEOINFOFRAME_1 0x58
+#define R600_HDMI_VIDEOINFOFRAME_2 0x5c
+#define R600_HDMI_VIDEOINFOFRAME_3 0x60
+#define R600_HDMI_32kHz_CTS        0xac
+#define R600_HDMI_32kHz_N          0xb0
+#define R600_HDMI_44_1kHz_CTS      0xb4
+#define R600_HDMI_44_1kHz_N        0xb8
+#define R600_HDMI_48kHz_CTS        0xbc
+#define R600_HDMI_48kHz_N          0xc0
+#define R600_HDMI_AUDIOINFOFRAME_0 0xcc
+#define R600_HDMI_AUDIOINFOFRAME_1 0xd0
+#define R600_HDMI_IEC60958_1       0xd4
+#define R600_HDMI_IEC60958_2       0xd8
+#define R600_HDMI_UNKNOWN_2        0xdc
+#define R600_HDMI_AUDIO_DEBUG_0    0xe0
+#define R600_HDMI_AUDIO_DEBUG_1    0xe4
+#define R600_HDMI_AUDIO_DEBUG_2    0xe8
+#define R600_HDMI_AUDIO_DEBUG_3    0xec
 
 #endif
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index e3c494097f6..cd650fd3964 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -89,6 +89,7 @@ extern int radeon_testing;
 extern int radeon_connector_table;
 extern int radeon_tv;
 extern int radeon_new_pll;
+extern int radeon_audio;
 
 /*
  * Copy from radeon_drv.h so we don't have to include both and have conflicting
@@ -814,6 +815,14 @@ struct radeon_device {
 	struct r600_ih ih; /* r6/700 interrupt ring */
 	struct workqueue_struct *wq;
 	struct work_struct hotplug_work;
+
+	/* audio stuff */
+	struct timer_list	audio_timer;
+	int			audio_channels;
+	int			audio_rate;
+	int			audio_bits_per_sample;
+	uint8_t			audio_status_bits;
+	uint8_t			audio_category_code;
 };
 
 int radeon_device_init(struct radeon_device *rdev,
@@ -1147,6 +1156,21 @@ extern void r600_irq_fini(struct radeon_device *rdev);
 extern void r600_ih_ring_init(struct radeon_device *rdev, unsigned ring_size);
 extern int r600_irq_set(struct radeon_device *rdev);
 
+extern int r600_audio_init(struct radeon_device *rdev);
+extern int r600_audio_tmds_index(struct drm_encoder *encoder);
+extern void r600_audio_set_clock(struct drm_encoder *encoder, int clock);
+extern void r600_audio_fini(struct radeon_device *rdev);
+extern void r600_hdmi_init(struct drm_encoder *encoder);
+extern void r600_hdmi_enable(struct drm_encoder *encoder, int enable);
+extern void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode);
+extern int r600_hdmi_buffer_status_changed(struct drm_encoder *encoder);
+extern void r600_hdmi_update_audio_settings(struct drm_encoder *encoder,
+					    int channels,
+					    int rate,
+					    int bps,
+					    uint8_t status_bits,
+					    uint8_t category_code);
+
 #include "radeon_object.h"
 
 #endif
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index c5c45e626d7..dbd56ef82f9 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -87,6 +87,7 @@ int radeon_testing = 0;
 int radeon_connector_table = 0;
 int radeon_tv = 1;
 int radeon_new_pll = 1;
+int radeon_audio = 1;
 
 MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
 module_param_named(no_wb, radeon_no_wb, int, 0444);
@@ -124,6 +125,9 @@ module_param_named(tv, radeon_tv, int, 0444);
 MODULE_PARM_DESC(new_pll, "Select new PLL code for AVIVO chips");
 module_param_named(new_pll, radeon_new_pll, int, 0444);
 
+MODULE_PARM_DESC(audio, "Audio enable (0 = disable)");
+module_param_named(audio, radeon_audio, int, 0444);
+
 static int radeon_suspend(struct drm_device *dev, pm_message_t state)
 {
 	drm_radeon_private_t *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index b4f23ec9320..0d1d908e522 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -438,6 +438,7 @@ atombios_digital_setup(struct drm_encoder *encoder, int action)
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	union lvds_encoder_control args;
 	int index = 0;
+	int hdmi_detected = 0;
 	uint8_t frev, crev;
 	struct radeon_encoder_atom_dig *dig;
 	struct drm_connector *connector;
@@ -458,6 +459,9 @@ atombios_digital_setup(struct drm_encoder *encoder, int action)
 	if (!radeon_connector->con_priv)
 		return;
 
+	if (drm_detect_hdmi_monitor(radeon_connector->edid))
+		hdmi_detected = 1;
+
 	dig_connector = radeon_connector->con_priv;
 
 	memset(&args, 0, sizeof(args));
@@ -487,7 +491,7 @@ atombios_digital_setup(struct drm_encoder *encoder, int action)
 		case 1:
 			args.v1.ucMisc = 0;
 			args.v1.ucAction = action;
-			if (drm_detect_hdmi_monitor(radeon_connector->edid))
+			if (hdmi_detected)
 				args.v1.ucMisc |= PANEL_ENCODER_MISC_HDMI_TYPE;
 			args.v1.usPixelClock = cpu_to_le16(radeon_encoder->pixel_clock / 10);
 			if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
@@ -512,7 +516,7 @@ atombios_digital_setup(struct drm_encoder *encoder, int action)
 				if (dig->coherent_mode)
 					args.v2.ucMisc |= PANEL_ENCODER_MISC_COHERENT;
 			}
-			if (drm_detect_hdmi_monitor(radeon_connector->edid))
+			if (hdmi_detected)
 				args.v2.ucMisc |= PANEL_ENCODER_MISC_HDMI_TYPE;
 			args.v2.usPixelClock = cpu_to_le16(radeon_encoder->pixel_clock / 10);
 			args.v2.ucTruncate = 0;
@@ -552,7 +556,7 @@ atombios_digital_setup(struct drm_encoder *encoder, int action)
 	}
 
 	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
-
+	r600_hdmi_enable(encoder, hdmi_detected);
 }
 
 int
@@ -893,7 +897,6 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t
 	}
 
 	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
-
 }
 
 static void
@@ -1162,7 +1165,6 @@ atombios_set_encoder_crtc_source(struct drm_encoder *encoder)
 	}
 
 	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
-
 }
 
 static void
@@ -1265,6 +1267,8 @@ radeon_atom_encoder_mode_set(struct drm_encoder *encoder,
 		break;
 	}
 	atombios_apply_encoder_quirks(encoder, adjusted_mode);
+
+	r600_hdmi_setmode(encoder, adjusted_mode);
 }
 
 static bool
@@ -1510,4 +1514,6 @@ radeon_add_atom_encoder(struct drm_device *dev, uint32_t encoder_id, uint32_t su
 		drm_encoder_helper_add(encoder, &radeon_atom_dig_helper_funcs);
 		break;
 	}
+
+	r600_hdmi_init(encoder);
 }
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 44d4b652ea1..3dcbe130c42 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -334,6 +334,9 @@ struct radeon_encoder {
 	enum radeon_rmx_type rmx_type;
 	struct drm_display_mode native_mode;
 	void *enc_priv;
+	int hdmi_offset;
+	int hdmi_audio_workaround;
+	int hdmi_buffer_status;
 };
 
 struct radeon_connector_atom_dig {